Objective To explore the incidence of atrial fibrillation in patients with breast cancer.

Methods A total of 706 breast cancer patients diagnosed by surgery and pathology admitted to the Department of Breast Surgery, Huangpu Branch of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine from July 2020 to December 2020 were included. Age, histories of atrial fibrillation, hypertension, diabetes, heart failure, and stroke were analyzed according to the medical history data. For patients with atrial fibrillation, the CHADS2 score was performed.

Results The rate of atrial fibrillation (2.97%) in breast cancer patients was significantly higher than that in the total population (1.70%, P < 0.05). The CHADS2 score of breast cancer patients with atrial fibrillation was 2.19±1.33, and the proportions of patients with hypertension (76.19% vs 28.76%), heart failure (14.29% vs 0), and stroke (42.86% vs 1.61%) were higher than those of patients without atrial fibrillation (P < 0.05).

Conclusions Atrial fibrillation is more common in breast cancer patients, among them, the proportions of patient with other cardiovascular or cerebrovascular diseases increases. which needs more attention.